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Magnetic, structural and surface properties of functionalized maghemite nanoparticles for copper and lead adsorption

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dc.contributor.author Guivar, JAR es_PE
dc.contributor.author Sadrollahi, E es_PE
dc.contributor.author Menzel, D es_PE
dc.contributor.author Fernandes, EGR es_PE
dc.contributor.author Loez, EO es_PE
dc.contributor.author Torres, MM es_PE
dc.contributor.author Arsuaga, JM es_PE
dc.contributor.author Arencibia, A es_PE
dc.contributor.author Litterst, FJ es_PE
dc.date.accessioned 2024-05-30T23:13:38Z
dc.date.available 2024-05-30T23:13:38Z
dc.date.issued 2017
dc.description.abstract In this study, magnetic nanocomposites were developed and used as adsorbents for lead and copper from aqueous media. Structural, surface, magnetic and textural properties of functionalized maghemite nanoparticles synthesized by alkaline co-precipitation were studied. The surfaces of the iron oxide nanoparticles (Nps) were modified with different chemical agents such as fatty and amino acids, silica (SiO2), mesoporous silica (SBA-15), hydroxyapatite, multiwall carbon nanotubes (MWCNTs) and ethylenediaminetetraacetic acid (EDTA), obtaining NPs with mean particle sizes ranging from 7 to 16 nm according to Rietveld refinement and TEM images analysis. The physicochemical surface properties of the functionalized materials were studied via zeta potential (z) and Fourier transform infrared (FTIR) spectroscopy. Mossbauer spectroscopy (MS) as a function of temperature and DC magnetometry were ¨ used to study the magnetic properties. The superparamagnetic relaxation was studied by MS. The resolved spectra at 20 K confirm the presence of nanomaghemite phase. Besides, the saturation magnetization varies from 12 to 62 emu g 1 . A nitrogen adsorption–desorption technique was used to determine the specific surface area and to study the porous structure. The functionalized g-Fe2O3 Nps exhibited a Brunauer–Emmett–Teller (BET) specific surface area ranging from 74 to 214 m2 g 1 and revealed remarkable uptake capacities to remove Cu(II) and Pb(II) species from aqueous solutions en
dc.description.sponsorship Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica - Concytec
dc.identifier.doi https://doi.org/10.1039/c7ra02750h
dc.identifier.isi 458300100003
dc.identifier.uri https://hdl.handle.net/20.500.12390/976
dc.language.iso eng
dc.publisher Royal Society of Chemistry
dc.relation.ispartof RSC Advances
dc.rights info:eu-repo/semantics/openAccess
dc.rights.uri https://creativecommons.org/licenses/by/4.0/
dc.subject Adsorption en
dc.subject Alkalinity en
dc.subject Carbon en
dc.title Magnetic, structural and surface properties of functionalized maghemite nanoparticles for copper and lead adsorption
dc.type info:eu-repo/semantics/article
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